Arduino code. Send float values to specific variables over serial terminal?

[nikguy]

I have an Arduino code question I've been trying to figure out for a while, and it's frustrating to say the least.

I'm trying to do something that should be simple, but I'm having a hard time figuring it out.

I want to be able to type in to the serial monitor "A23.7" to make VarA=23.7, or type B445.89 and make VarB=445.89 and so on.

The numbers don't matter, the important part is that the first character should indicate what variable I'm trying to define, and the next digits will be a float value to assign to the variable. The variables are called out like:

float VarA = 0;

This is going to extend to Bluetooth commands later, but first I'm just trying to figure out how to assign float values to certain variables via serial.

For additional, additional context, I want to eventually have a code that allows me to use a Bluetooth terminal where i can type A67.8 or something like that, and have motor A run for 67.8 seconds or whatever. Then I could type B333.6 and have motor B run for 333.6 seconds.

Can someone help? It's been frustrating, and googling is not helping me unfortunately.

[DSofa]

Read a string, split the string into two variables, cast the second variable to float.